CN108420487B - Visual controllable hooking recovery device for intra-cavity support - Google Patents
Visual controllable hooking recovery device for intra-cavity support Download PDFInfo
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- CN108420487B CN108420487B CN201810314112.2A CN201810314112A CN108420487B CN 108420487 B CN108420487 B CN 108420487B CN 201810314112 A CN201810314112 A CN 201810314112A CN 108420487 B CN108420487 B CN 108420487B
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- hook
- pipe
- ring
- bracket
- fixed sleeve
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- 238000011084 recovery Methods 0.000 title claims abstract description 15
- 230000000007 visual effect Effects 0.000 title abstract description 6
- 230000007246 mechanism Effects 0.000 claims description 18
- 238000013461 design Methods 0.000 claims description 9
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- 238000004064 recycling Methods 0.000 claims 1
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- 206010071229 Procedural haemorrhage Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12027—Type of occlusion
- A61B17/1204—Type of occlusion temporary occlusion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/12136—Balloons
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/42—Gynaecological or obstetrical instruments or methods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/958—Inflatable balloons for placing stents or stent-grafts
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B2017/12004—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for haemostasis, for prevention of bleeding
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/42—Gynaecological or obstetrical instruments or methods
- A61B2017/4216—Operations on uterus, e.g. endometrium
Abstract
The invention relates to the technical field of medical equipment, in particular to a visual and controllable hooking recovery device of a bracket in a cavity; the invention comprises a fixed sleeve, a hook retraction tube and a hook tube; the front end of the hook pipe is provided with a hook for hooking the bracket, the tail end of the hook pipe is connected with a hook pushing ring, and the hook retraction pipe is provided with a pushing check ring for pushing the hook pushing ring to enable the hook pipe to move forwards; in the invention, the hook retracting pipe is pushed to enable the pushing check ring to prop against the hook pushing ring, and the pushing check ring pushes the hook pushing ring to move along with the movement of the hook retracting pipe, so that the hook pipe moves along the hook through hole on the fixed sleeve, the hook at the front end of the hook pipe hooks the bracket, and the bracket is pulled out of the cavity; the invention has convenient operation and is easy to hook the bracket, so that the bracket is not easy to loosen and is convenient to recycle.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a visual and controllable hooking recovery device for a bracket in a cavity.
Background
In recent years, balloon catheter technology has been increasingly applied to various vascular diseases, such as arterial embolism, arterial stenosis and the like, and balloon dilatation and thrombus taking technology has gradually matured, but the balloon catheter cannot be guided by a guide wire, and has difficult operation on tortuous vessels, pathological stenosed vessels and the like.
With the development of the policy of two fetuses, the incidence rate of the lying-in woman foreplacenta and placenta placement is rapidly increased, especially the risk of the leading placenta, the average bleeding amount in natural production or caesarean section is up to 3000-5000 ml, even up to more than 10000 ml, and massive rapid bleeding in a short time seriously threatens the life safety of the lying-in woman and infants. The prior placenta is used for removing uterus by stopping bleeding after abnormal caesarean section operation, and the average blood loss in operation still reaches 4000-5000 ml. The application of the preventive abdominal aorta and the preventive internal iliac artery balloon occlusion in the placenta abnormal cases, whether the operation of retaining the uterus or hysterectomy is carried out, the blood transfusion amount in the operation is obviously reduced, and the safety of the puerpera and infants is ensured. The preventive application of the temporary interruption technique of the abdominal aortic blood flow or the iliac artery blood flow balloon before the natural production or caesarean section operation is compared with the conventional caesarean section, and the preventive temporary interruption technique of the abdominal aortic blood flow or the iliac artery blood flow is found to greatly reduce the intraoperative bleeding amount, blood transfusion amount and related complications of patients. However, the current balloon is a conventional high-pressure-resistant non-compliant expansion balloon, has single function and has the following defects: 1. the high-pressure resistant non-compliant balloon material is harder, and the risk of tearing damage to the vessel wall exists in the expanding process; 2. the high-pressure-resistant noncompliant balloon material is harder, the balloon shape is a constant cylinder, the balloon cannot be compliantly adapted to the shape of the inner cavity of the blood vessel, and the risk of tearing and damaging the wall of the blood vessel exists in the expanding process; 3. the diameter of the high-pressure-resistant noncompliant balloon which is fully expanded is fixed, the diameter of the abdominal aorta and the diameter of the iliac artery which are in individual change are difficult to be well adapted, and the potential risks that the blood flow of the blood vessel with the smaller balloon diameter is blocked incompletely and the blood vessel wall is torn due to the larger balloon diameter exist; 4. in the balloon expanding process, the blood pressure and the blood flow speed of the proximal end of the blocked blood vessel cannot be judged, and the blocking is incomplete; 5. when the noncompliant balloon exits the puncture passages of the internal iliac artery, the external iliac artery and the femoral artery, the balloon is hard and is incompletely retracted, so that the balloon is seriously damaged to the wall of the blood vessel, and the risks of secondary vascular embolism and vascular stenosis are gradually increased, so that in order to solve the problem, a bracket is generally placed in a cavity for protecting the cavity, and then the guide wire is used for guiding the cavity; however, the stent is placed in the lumen and is not easily recovered.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a visual and controllable hooking recovery device for a bracket in a cavity, and the hook push ring is pushed to move by the push check ring so as to enable a hook pipe to move along a hook through hole on a fixed sleeve, so that a hook at the front end of the hook pipe hooks the bracket, and the bracket is pulled out of the cavity.
The technical scheme for solving the technical problems is as follows:
the hook recovery device is used for hooking a bracket in a human body cavity and comprises a fixed sleeve, a hook receiving pipe sleeved in the fixed sleeve and a hook pipe sleeved in a hook through hole arranged on the fixed sleeve; the front end of the hook pipe is provided with a hook for hooking the bracket, the tail end of the hook pipe is connected with a hook pushing ring, and the hook winding and unwinding pipe is provided with a pushing check ring for pushing the hook pushing ring to enable the hook pipe to move forwards.
As an improvement of the invention, the device further comprises a sheath tube for sleeving the bracket and a pushing mechanism for moving the sheath tube, wherein the fixed sleeve tube is sleeved in the sheath tube.
As a further improvement of the invention, the invention also comprises a furling pipe sleeved in the sheath pipe, the fixed sleeve is sleeved in the furling pipe, and the hand pushing mechanism can also enable the furling pipe to move.
As a further improvement of the invention, the front end of the hook folding and unfolding pipe is provided with a hook supporting disc, and the hook supporting disc is provided with a hook supporting hole for the hook to pass through.
As a further improvement of the invention, a round hole is arranged on the hook pushing ring, and an expansion plug used for being inserted into the round hole is arranged at the tail end of the fixed sleeve.
As a further improvement of the invention, the hook tube is provided with a spring collar and a spring, the spring being located between the spring collar and the hook push ring.
As a further improvement of the invention, the front end of the folding pipe is provided with an elastic bracket folding piece, and the front end of the fixed sleeve is provided with a bulge for jacking up the bracket folding piece.
As a further improvement of the invention, a first external spiral strip is arranged on the sheath tube, and the hand pushing mechanism comprises a first hand wheel for being in threaded connection with the first external spiral strip.
As a further improvement of the invention, the folding pipe is provided with a second external spiral strip, and the hand pushing mechanism further comprises a second hand wheel which is used for being in threaded connection with the second external spiral strip.
As a further improvement of the invention, the hand pushing mechanism also comprises a handle, and a fixed ferrule, a first limit check ring and a second limit check ring which are connected with the handle; the fixed sleeve ring is sleeved on the fixed sleeve, the first limiting check ring and the second limiting check ring are sleeved on the sheath tube and the furling tube respectively, the first hand wheel is positioned between the two first limiting check rings, and the second hand wheel is positioned between the two second limiting check rings.
In the invention, the hook retracting pipe is pushed to enable the pushing check ring to prop against the hook pushing ring, and the pushing check ring pushes the hook pushing ring to move along with the movement of the hook retracting pipe, so that the hook pipe moves along the hook through hole on the fixed sleeve, the hook at the front end of the hook pipe hooks the bracket, and the bracket is pulled out of the cavity; the invention has convenient operation and is easy to hook the bracket, so that the bracket is not easy to loosen and is convenient to recycle.
Drawings
For ease of illustration, the invention is described in detail by the following preferred embodiments and the accompanying drawings.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a front view of FIG. 1 of the present invention;
FIG. 3 is a schematic view of the structure of the sheath tube of the present invention;
FIG. 4 is a schematic view of the front end of the gathering tube of the present invention;
FIG. 5 is a schematic view showing the divergent opening of the stent closure tab of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic view of the structure of the helical compression ring of the present invention;
FIG. 7 is a cross-sectional view of a locking sleeve of the present invention;
FIG. 8 is a schematic diagram of the connection structure between the rear end of the fixed sleeve and the hook pipe and the hook winding and unwinding pipe;
fig. 9 is a front view of fig. 8;
FIG. 10 is a schematic view of the rear end of the locking sleeve of the present invention;
FIG. 11 is a diagram showing the motion of the hook push ring of the present invention;
FIG. 12 is a second view of the motion state of the hook push ring of the present invention;
FIG. 13 is a schematic view of the connection structure of the pushing mechanism of the present invention with the sheath tube, the furling tube and the fixing sleeve;
FIG. 14 is a schematic view of a hand pushing mechanism according to the present invention;
FIG. 15 is a schematic view of the hook structure of the present invention;
FIG. 16 is a schematic diagram illustrating the operation status one of the present invention;
fig. 17 is a front view of fig. 16;
FIG. 18 is a schematic diagram illustrating a second operational state of the present invention;
fig. 19 is a front view of fig. 18;
FIG. 20 is a schematic diagram of the third operating state of the present invention;
fig. 21 is a front view of fig. 20;
FIG. 22 is a schematic diagram showing the structure of the fourth operating state of the present invention;
fig. 23 is a front view of fig. 22;
fig. 24 is a schematic structural diagram of an operation state five of the present invention;
fig. 25 is a front view of fig. 24;
fig. 26 is a schematic structural diagram of an operation state six of the present invention;
fig. 27 is a front view of fig. 26;
reference numerals: the sheath tube, 11-first outer spiral strips, 12-guide grooves, 2-gathering tubes, 21-support folding sheets, 22-second outer spiral strips, 23-outer long grooves, 24-inner long grooves, 25-spiral tightening rings, 3-fixed sleeves, 31-hook through holes, 32-expansion plugs, 33-bulges, 4-hook folding and unfolding tubes, 41-pushing check rings, 42-hook supporting disks, 43-pushing ends, 44-guide wires, 45-hook supporting holes, 46-check rings, 47-cambered surface tubes, 5-hook tubes, 51-hooks, 52-hook pushing rings, 53-spring check rings, 54-springs, 55-beads, 56-round holes, 6-pushing mechanisms, 61-first hand wheels, 62-second hand wheels, 63-handles, 64-fixed rings, 65-first limiting check rings, 66-second limiting check rings and 67-guide blocks.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
As shown in fig. 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14 and 15, the invention relates to a hook recovery device for a visible and controllable stent in a cavity, which is used for hooking a stent 7 in a cavity of a human body and comprises a fixed sleeve 3, a hook receiving and releasing tube 4 sleeved in the fixed sleeve 3 and a hook tube 5 sleeved in a hook through hole 31 arranged on the fixed sleeve 3.
The front end of the hook pipe 5 is provided with a hook 51 for hooking the bracket 7, the tail end of the hook pipe 5 is connected with a hook push ring 52, and the hook retraction pipe 4 is provided with a push check ring 41 for pushing the hook push ring 52 to move the hook pipe 5.
In the invention, the hook retracting tube 4 is pushed, the push retainer ring 41 is made to prop against the hook push ring 52, and along with the movement of the hook retracting tube 4, the push retainer ring 41 is pushed to move the hook push ring 52, so that the hook tube 5 moves along the hook through hole 31 on the fixed sleeve 3, the hook at the front end of the hook tube 5 hooks the bracket 7, and the bracket 7 is pulled out of the cavity.
Further, the hook recovery device of the visible and controllable intra-cavity stent also comprises a sheath tube 1 for sleeving the stent 7 and a hand pushing mechanism 6 for moving the sheath tube 1, wherein the fixed sleeve tube 3 is sleeved in the sheath tube 1; the front end of the sheath tube 1 is horn-shaped, so that the support 7 can be conveniently sleeved.
Still further, the hook recovery device of the visual and controllable intra-cavity support also comprises a furling pipe 2 sleeved in the sheath pipe 1, the fixed sleeve 3 is sleeved in the furling pipe 2, and the hand pushing mechanism 6 can also enable the furling pipe 2 to move.
In the invention, the front end of the hook folding and unfolding pipe 4 is provided with the hook supporting disc 42, and the hook supporting disc 42 is provided with the hook supporting hole 45 for the hook 51 to pass through, so that the hook 51 can be tilted conveniently.
In the invention, a round hole 56 is arranged on the hook push ring 52, and the tail end of the fixed sleeve 3 is provided with an expansion plug 32 for being inserted into the round hole 56; the expansion plug 32 is designed to be split from top to middle lower end, and the front end of the expansion plug 32 is split to be in a micro-open state under the action of no external force, so that when the expansion plug is conveniently clamped into a round hole, the expansion plug is opened to clamp the round hole 56.
In order to facilitate the hook 51 to hook the bracket 7, the hook pipe 5 is provided with a spring retainer 53 and a spring 54, and the spring 54 is positioned between the spring retainer 53 and the hook push ring 52.
In order to facilitate the collection of the bracket 7, the front end of the folding tube 2 is provided with an elastic bracket folding piece 21, and the front end of the fixed sleeve 3 is provided with a bulge 33 for jacking up the bracket folding piece 21.
In order to facilitate the movement of the sheath tube 1, the sheath tube 1 is provided with a first outer spiral stripe 11, and the hand pushing mechanism 6 comprises a first hand wheel 61 for being in threaded connection with the first outer spiral stripe 11; the folding tube 2 is provided with a second external spiral strip 22, and the hand pushing mechanism 6 further comprises a second hand wheel 62 which is used for being in threaded connection with the second external spiral strip 22.
As shown in fig. 14, the hand pushing mechanism 6 further comprises a handle 63, and a fixed collar 64, a first limit check ring 65 and a second limit check ring 66 which are connected with the handle 63; the fixed ferrule 64 is sleeved on the fixed sleeve 3, the first limiting retainer ring 65 and the second limiting retainer ring 66 are sleeved on the sheath tube 1 and the furling tube 2 respectively, the first hand wheel 61 is positioned between the two first limiting retainer rings 65, and the second hand wheel 62 is positioned between the two second limiting retainer rings 66.
In the invention, the first outer spiral stripe 11 and the second outer spiral stripe 22 are respectively provided with a guide groove 12, and the first limit check ring 65 and the second limit check ring 66 are respectively provided with a guide block 67 for sliding in the guide groove 12.
In the present invention, the shape of the hook 51 is a triangle, preferably, the shape of the hook 51 is a pure triangle, the end of the hook 51 is provided with a ball 55, and the ball 55 and the hook tube 5 have a slit for being clamped into the bracket 7.
In the invention, an outer long groove 23 is arranged on the outer wall of a bracket folding piece 21, and a spiral tightening ring 25 is arranged on the outer long groove 23; the inner wall of the bracket folding piece 21 is provided with an inner long groove 24, the inner long groove 24 is used for guiding the hook 51, when the hook 51 diverges and expands outwards, the hook 51 can expand forwards and outwards along the direction of the inner long groove 24 of the inner wall of the bracket folding piece 21, and the hook 51 cannot deviate when the angle becomes larger and diverges.
The rear end of the hook winding and unwinding pipe 4 is provided with a pushing end 43 for pushing, and the pushing end 43 consists of two check rings 46 and a cambered surface pipe 47; a guide wire 44 can be led into the hook winding and unwinding tube 4, so that the traction operation can be conveniently performed by using the guide wire 44.
The present invention provides one embodiment:
the outermost end of the embodiment is a sheath tube 1, the middle of the sheath tube 1 is of a sleeve structure, the front end of the sheath tube 1 is in a flare-shaped divergent shape, the effect is to facilitate the sheath tube 1 to be sleeved and taken in for recovery of the stent 7, the edge position of the foremost end of the sheath tube 1 is of a round chamfer design, when the stent is prevented from being taken in, the edge of the front end of the sheath tube 1 scratches the inner wall of a lumen, a furling tube 2 is sleeved in the sheath tube 1, the middle of the furling tube 2 is of a sleeve structure, the front end of the furling tube 2 is of three or more stent furling sheets 21 which can be uniformly distributed circumferentially and have elastic arc-shaped sheet designs, the inner wall of the stent furling sheets 21 is gradually thickened from the edge of the front end to the rear, when the stent furling sheets 21 at the front end of the furling tube 2 are in the action of no external force, the stent furling sheets 21 are in a flare-shaped divergent shape, a circumferential outer long groove 23 is opened at the middle position of the outer wall of the stent furling sheets 21, a spiral furling ring 25 is sleeved in the outer long groove 23, the spiral tightening ring 25 plays a role in tightening the bracket folding pieces 21 at the front end of the folding tube 2, so that the bracket folding pieces 21 are kept in a state of being horizontally tightened in the sheath tube 1 when not jacked, the inside of the folding tube 2 is sleeved with the fixing sleeve 3, the outer wall of the front end of the fixing sleeve 3 is designed into a section of wavy bulge 33 with a smooth curved surface, the inside of the fixing sleeve 3 penetrates through the hollow front and back, a thicker wall thickness is arranged between the inner wall and the outer wall of the fixing sleeve 3, three or more than three hook through holes 31 are uniformly distributed in the circumference of the wall of the fixing sleeve 3, the number of the hook through holes 31 is the same as that of the bracket folding pieces 21 at the front end of the folding tube 2, the hook through holes 31 in the fixing sleeve 3 correspond to the positions of the bracket folding pieces 21 one by one, the hook through holes 31 penetrate through the hook tubes 5, and the aperture of the hook through holes 31 is slightly larger than the outer diameter of the hook through tubes 5, the inside of the fixed sleeve 3 is sleeved with a hook retraction tube 4, the front end of the hook retraction tube 4 is coaxially and fixedly provided with a hook supporting disc 42 with the outer diameter far larger than the outer diameter of the hook retraction tube 4, the circumference of the hook supporting disc 42 is uniformly distributed with hook supporting holes 45 with the same number as that of the hook through holes 31, the hook tube 5 passes through the hook through holes 31 and then continuously passes through the hook supporting holes 45, the distance between the hook supporting holes 45 and the axis of the fixed sleeve 3 is larger than the distance between the hook through holes 31 and the axis of the fixed sleeve 3, so that the hook tube 5 passing through the hook through holes 31 and the hook supporting holes 45 is in an angle lifting state, when the distance between the hook through holes 31 and the hook supporting holes 45 is farther, the divergence angle between the hook tubes 5 is smaller, when the distance between the hook through holes 31 and the hook supporting holes 43 is nearer, the divergence angle between the hook tubes 5 is larger, the angle of the hook supporting hole 43 on the hook supporting disc 42 at the front end of the hook receiving and releasing pipe 4 is also in a raised and divergent shape, the front end of the hook pipe 5 is designed into a hook 51, the hook 51 is designed into a triangle shape which is bent from the outer side to the inner side, the angle of the tail end of the triangle-shaped hook is an obtuse angle, the success rate can be greatly increased conveniently in the process of hooking the bracket 7, the bracket 7 is difficult to fall off from the inside of the hook 51 due to the obtuse angle design after the bracket 7 is hooked, the hook pipe 5 is gradually reduced in the process from the initial bending position to the tail end of the triangle bending, the hook 51 cannot pass through the mesh of the bracket 7 when the bracket 7 is hooked, the tail end of the hook 51 is integrally provided with a round bead 55 with the outer diameter slightly larger than the tail end of the hook 51, the falling of the bracket 7 is further prevented, the directions of the hooks 51 are evenly distributed on the circumference are all directions of the outer sides of the normal plane of the corresponding circumferential positions of the hook 51, the brackets 7 at the corresponding positions are conveniently hooked, hooks 51 distributed on the circumference are in one-to-one correspondence with the bracket folding pieces 21 at the outer side of the circumference, each hook 51 corresponds to the middle position of the bracket folding piece 21 at the outer side of the circumference, the middle position of the inner wall of the bracket folding piece 21 is provided with the inner long groove 24, the inner long groove 24 plays a role in guiding the hooks 51, when the hooks 51 diverge and expand outwards, the hooks 51 can expand forwards and outwards along the direction of the inner long groove 24 of the inner wall of the bracket folding piece 21, and the hooks 51 cannot deviate when the angle of the hooks becomes larger and diverges; the outer wall of the rear end area of the sheath tube 1 is provided with a first outer spiral stripe 11, the outer periphery of the first outer spiral stripe 11 is sleeved with a first hand wheel 61, the inner wall of the first hand wheel 61 is sleeved with an inner thread, the first outer spiral stripe 11 is in threaded connection with the first outer spiral stripe 11, the outer wall of the first hand wheel 61 is provided with knurling, friction is increased when fingers roll the first hand wheel 61 conveniently, the front end and the rear end of the first hand wheel 61 are respectively provided with a first limit check ring 65, the inner walls of the lower ends of the two first limit check rings 65 are uniformly provided with guide blocks 67, the position of the first outer spiral stripe 11 area of the sheath tube 1 corresponding to the guide blocks 67 is axially provided with a guide groove 12, the guide groove 12 penetrates through the area of the first outer spiral stripe 11, the guide blocks 67 and the guide groove 12 have a guide effect so that when the first hand wheel 61 is rotated, the sheath tube 1 can be axially moved without rotation under the threaded connection fit, the length of the rear end of the furling tube 2 is longer than the sheath tube 1, the outer wall of the rear end of the folding tube 2 is integrally provided with a second outer spiral stripe 22, the periphery of the second outer spiral stripe 22 is sleeved with a second hand wheel 62, the inner wall of the second hand wheel 62 is sleeved with an inner thread, the second outer spiral stripe 22 is in threaded connection with the second outer spiral stripe 22, the outer wall of the second hand wheel 62 is provided with knurling, friction is increased when fingers roll the second hand wheel 62 conveniently, the front end and the rear end of the second hand wheel 62 are respectively provided with a second limiting check ring 66, the inner wall of the lower end of the second limiting check ring 66 is uniformly provided with a guide block 67, the position of the second outer spiral stripe 22 of the folding tube 2 corresponding to the guide block 67 is axially provided with a guide groove 12, the guide groove 12 penetrates through the second outer spiral stripe 22, the first limiting check rings 65 at the two ends of the first hand wheel 61 and the second limiting check rings 66 at the two ends of the second hand wheel 62 are both fixed on a handle 63, the length of the rear end of the fixed sleeve 3 is longer than that of the folding tube 2, the rear end of the fixed sleeve 3 is coaxially and fixedly connected with the fixed sleeve 3 on the outer wall of the area exposing the furled pipe 2, the fixed sleeve 3 is fixedly connected with a handle 63, the spacing parts of the hook through holes 31 on the pipe wall end face of the rear end of the fixed sleeve 3 are symmetrically and fixedly connected with expansion plugs 32, the top ends of the expansion plugs 32 are designed into a cambered surface cap shape, the outer diameter of the cambered surface cap is larger than the outer diameter of the expansion plugs 32, the expansion plugs 32 are in a forked design from top to middle lower end, under the action of no external force, the front end of the expansion plugs 32 is forked to be in a slightly opened state, the hook through holes 31 on the rear end of the fixed sleeve 3 extend out of the hook pipe 5, the tail end of the hook pipe 5 passes through the hook push ring 52, the hook pipe 5 on the two ends of the hook push ring 52 is coaxially and fixedly provided with a spring retainer ring 53, a spring 54 is sleeved on the hook pipe 5 between the spring retainer ring 53 and the hook push ring 52, the two springs 54 on each hook pipe 5 at the two ends of the hook push ring 52 can actively and finely tune the hooks 51 when the bracket 7 is hooked, each hook 51 can finely tune the hook according to the actual situation when the springs 54 are actually hooked, so that the hooked power is larger, the unhooking condition of any hook 51 is avoided to the greatest extent, the hook push ring 52 is provided with a round hole 56 at the position corresponding to the front end expansion plug 32 of the fixed sleeve 3 in the axial direction, the aperture of the round hole 56 is slightly larger than the outer diameter of the expansion plug 32 and smaller than the outer diameter of the cambered surface cap of the expansion plug 32, so that after the hook push ring 52 moves forwards and the expansion plug 32 passes through the round hole 56 of the hook push ring 52, the hook push ring 52 cannot be separated from the expansion plug 32 of the fixed sleeve 3 under the expansion effect of the expansion plug 32 and the effect of the cambered surface cap, the length of the rear end of the hook receiving and releasing pipe 4 is longer than the hook pipe 5, the end of the hook receiving and releasing pipe 4 is integrally provided with a push-pull end 43 consisting of two check rings 46 and a cambered surface pipe 47, and the push-pull end 43 is used for manually pushing and controlling the hook receiving and releasing pipe 4 to axially move back and forth, the hook receiving and releasing pipe 4 at the front position of the push-pull end 43 is coaxially and fixedly provided with a push check ring 41, the position of the push check ring 41 is positioned at the rear side of the hook push ring 52, and the hook push ring 52 is driven to synchronously move forward when the hook receiving and releasing pipe 4 moves forward axially, so that the hook pipe 5 and the hook receiving and releasing pipe 4 synchronously move forward axially.
In this embodiment, couple 5 front end designs into couple 51, couple 51 designs into the triangle form of bending from outside to inside, and triangle form couple terminal angle is the obtuse angle moreover, conveniently can very big increase the success rate at the in-process of hooking support 7, and the design of obtuse angle makes support 7 be difficult to drop from couple 51 inside after hooking support 7 moreover, and couple 51 is from beginning bending department to triangle bending terminal in-process couple pipe is gradually reduced, make couple 51 can not appear unable condition through the mesh of support 7 when hooking support 7, couple 51 terminal an organic whole is provided with the external diameter slightly bigger with couple terminal diameter's round bead 55, thereby further prevent the drop of support 7.
In this embodiment, the middle of the folding tube 2 is a sleeve structure, the front end of the folding tube is provided with three or more than three support folding pieces 21 with elastic arc-shaped sheet designs which can be uniformly distributed circumferentially, the support folding pieces 21 gradually become thicker from the front end edge to the rear inner wall, when the support folding pieces 21 at the front end of the folding tube 2 are in no external force, the support folding pieces 21 are in a horn-shaped divergence shape, and a circumferential outer long groove 23 is formed in the middle position of the outer wall of the support folding pieces 21.
In this embodiment, the front end of the hook receiving and releasing pipe 4 is coaxially and fixedly provided with a hook supporting disk 42 with an outer diameter far greater than that of the hook receiving and releasing pipe 4, the hook supporting disk 42 is uniformly provided with hook supporting holes 45 with the same number as that of the hook through holes 31 in circumference, the hook pipe 5 passes through the hook through holes 31 and then continues to pass through the hook supporting holes 45, and the distance between the hook supporting holes 45 and the axis of the fixed sleeve 3 is greater than that between the hook through holes 31 and the axis of the fixed sleeve 3, so that the hook pipe 5 passing through the hook through holes 31 and the hook supporting holes 45 is in an angle-lifted state, when the distance between the hook through holes 31 and the hook supporting holes 45 is far, the divergence angle between the hook pipes 5 is smaller, and when the hook through holes 31 and the hook supporting holes 45 are near, the divergence angle between the hook pipes 5 is larger, and the angle between the hook supporting holes 45 on the hook receiving and releasing pipe 4 is also in a lifted-up divergence-type distribution.
In this embodiment, the spiral tightening ring 25 is sleeved inside the outer long groove 23 of the bracket folding piece 21, and the spiral tightening ring 25 plays a role in tightening the bracket folding piece 21 at the front end of the folding tube 2, so that the bracket folding piece 21 maintains a horizontally tightened state in the sheath tube 1 when not being jacked up.
In this embodiment, the front end of the sheath tube 1 is in a flare divergent shape, which is convenient for the recovery of the sheath tube 1 by sleeving the stent 7, and the edge position of the forefront end of the sheath tube 1 is designed as a round chamfer, so that the front edge of the sheath tube 1 is prevented from scratching the inner wall of the lumen when entering the body.
In this embodiment, the outer wall of the front end of the fixing sleeve 3 is designed as a section of wavy bulge 33 with a smooth curved surface, the inside of the fixing sleeve 3 is hollow in a front-back penetrating way, a thicker wall thickness is arranged between the inner wall and the outer wall of the fixing sleeve 3, three or more than three hook through holes 31 are uniformly distributed on the circumference of the pipe wall of the fixing sleeve 3, the number of the hook through holes 31 is the same as that of the bracket folding pieces 21 at the front end of the folding pipe 2, the hook through holes 31 in the inside of the fixing sleeve 3 are in one-to-one correspondence with the positions of the bracket folding pieces 21, a hook pipe 5 is penetrated in each hook through hole 31, and the aperture of the hook through hole 31 is slightly larger than the outer diameter of the hook pipe 5.
In this embodiment, a first outer spiral stripe 11 is designed on the outer wall of the rear end region of the sheath tube 1, a first hand wheel 61 is sleeved on the outer periphery of the first outer spiral stripe 11, an inner thread is sleeved on the inner wall of the first hand wheel 61 and is in threaded connection with the first outer spiral stripe 11, knurls are arranged on the outer wall of the first hand wheel 61, so that fingers can conveniently increase friction when rolling the first hand wheel 61, first limiting check rings 65 are respectively arranged at the front end and the rear end of the first hand wheel 61, guide blocks 67 are uniformly designed on the inner walls of the lower ends of the two first limiting check rings 65, guide grooves 12 are axially arranged at positions, corresponding to the guide blocks 67, of the first outer spiral stripe 11 region of the sheath tube 1, the guide grooves 12 penetrate through the first outer spiral stripe 11 region, and the rear end of the furling tube 2 adopts the same structure.
In the embodiment, expansion plugs 32 are symmetrically and fixedly connected at intervals of through holes of hooks on the end face of the tube wall of the rear end of the fixed sleeve 3, the top end of each expansion plug 32 is designed into a cambered surface cap shape, the outer diameter of each cambered surface cap is larger than that of a rod of each expansion plug 32, the expansion plugs 32 are designed to be split from the top to the middle lower end, and the front ends of the expansion plugs 32 are split into a slightly-opened state under the action of no external force.
In this embodiment, the end of the hook tube 5 passes through the hook pushing ring 52, the hook tubes 5 at two ends of the hook pushing ring 52 are coaxially and fixedly provided with the spring retainer ring 53, the hook tube 5 between the spring retainer ring 53 and the hook pushing ring 52 is sleeved with the spring 54, the two springs 54 on each hook tube 5 at two ends of the hook pushing ring 52 can enable the hooks 51 to actively fine-tune when the support 7 is hooked, and each hook 51 can finely tune according to the actual situation when the springs 54 are actually hooked so that the hooked power is larger, and the unhooking condition of any hook 51 is avoided to the greatest extent.
In this embodiment, the end of the hook receiving and releasing tube 4 is integrally provided with a push-pull end 43 composed of two check rings 46 and a cambered surface tube 47, which is used for manually pushing and pulling the hook receiving and releasing tube 4 to move forward and backward in the axial direction, the hook receiving and releasing tube 4 positioned at the front position of the push-pull end 43 is coaxially and fixedly provided with a push check ring 41, the position of the push check ring 41 is positioned at the rear side of the hook push ring 52, and the hook push ring 52 is driven to move forward synchronously when the hook receiving and releasing tube 4 moves forward in the axial direction, so that the hook tube 5 and the hook receiving and releasing tube 4 move forward synchronously in the axial direction.
When this embodiment is operated, there are six operating states, as shown in fig. 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, and 27:
the working state is as follows: when the stent is required to be taken out before the stent operation, the stent folding piece 21 at the front end of the furling pipe 2, the hook supporting disc 42 at the front end of the hook folding pipe 4 and the hook 51 are contracted in the sheath pipe 1, the hook 51 is in an unreleased state, the stent folding piece 21 is in a folded state under the contraction of the spiral tightening ring 25, at the moment, the distance between the position of the pushing retainer ring 41 of the hook folding pipe 4 and the tail end of the fixed sleeve 3 is at the maximum, the hook pushing ring 52 is tightly attached to the pushing retainer ring 41, the hook 51 is contracted in front of the hook supporting disc 42, the front end of the device is penetrated into the body, the front end of the sheath pipe 1 is enabled to approach the stent 7 in the pipe cavity, a certain distance is reserved between the sheath pipe 1 and the stent 7, at this moment, the pushing end 43 of the hook folding pipe 4 is axially pushed, the pushing retainer ring 41 of the hook folding pipe 4 drives the hook pushing ring 52 to axially move forwards, the hook pushing ring 52 drives the hook 5 to synchronously move forwards, at this moment, the hook supporting disc 42 and the pipe 5 synchronously axially moves forwards, the hook pushing ring 52 is tightly moves to the inner diameter of the hook plug 52, and the hook plug 52 is enabled to be pushed to be positioned at the inner diameter of the hook 4, the hook plug 52 is enabled to be pushed to be tightly opposite to the inner diameter of the hook plug 52, and the hook plug 52 is enabled to be pushed to be expanded to be positioned at the inner diameter of the hook plug 52, and the hook plug 52 is enabled to be expanded, and the hook 32 is enabled to be expanded, and the expansion plug 52 is enabled to be expanded, and the expansion sleeve 32 is simultaneously, and the expansion plug 52 is enabled to be pushed to be axially to be expanded, and moved, and the expansion sleeve is opened.
And the working state is as follows: the push-pull end 43 of the hook receiving and releasing tube 4 is pulled backwards and axially, the hook receiving and releasing tube 4 drives the hook supporting disk 42 to move towards the rear end and axially, the hook pushing ring 52 is in a static state because the hook pushing ring 52 is clamped in the expansion plug 32 of the fixed sleeve 3, in the process, the hook supporting disk 42 moves backwards and axially relative to the hook 51, at the moment, the hook supporting disk 42 is close to the hook through hole 31 on the front end surface of the fixed sleeve 3, because the circumferential outer diameter of the circumferential distribution of the hook supporting hole 45 is larger than the circumferential outer diameter of the hook through hole 31, when the distance between the hook supporting disk 42 and the hook through hole 31 of the fixed sleeve 3 is closer, the hook tube 5 and the angle between the hook supporting disk 42 and the hook through hole 31 are lifted more, and meanwhile, the distance between the hook 51 and the hook supporting disk 42 is larger, because the angle of the hook supporting holes 45 on the hook supporting disc 42 at the front end of the hook folding and unfolding pipe 4 is also in lifting divergent distribution, when the hook 51 is far away from the hook supporting holes 45, the hook 51 is lifted along with the hook pipe 5 when the angle of the hook pipe 5 is lifted, so that the hook pipe 5 with the circumference evenly distributed achieves the divergent effect, when the angle of the hook pipe 5 is lifted to the maximum, the height of the hook 51 just reaches the outer diameter of the support 7 when the support 7 is lifted, at the moment, the device is slightly moved, so that the hook 51 is hooked on the braiding wires of the edge area of the support 7, at the moment, the spring retainer 53 at the rear end of the hook pipe 5 is matched with the spring 54, so that each hook 51 can be automatically adjusted according to the braiding wires of the support 7 to be hooked by itself, and each hook 51 is hooked on the support 7.
And the working state is three: push-pull end 43 of support receive and release pipe 4 is pushed for support receive and release pipe 4 axial forward removes, and couple receive and release pipe 4 drives support jack-up dish 42 and moves forward this moment, and couple 51 and support jack-up dish 42 interval reduces, and the interval between couple via hole 31 of fixed sleeve 3 section front end terminal surface and the support jack-up dish 42 increases, makes couple 51 change the state from expanding the divergence state into the closure state under support jack-up dish 42 effect, and the edge region of the couple 51 hook of support 7 also struts and becomes the closure, and support 7 state is similar to a section of thin thick horn mouth of section this moment.
And the working state is four: the second hand wheel 62 is turned, because the second hand wheel 62 is in spiral connection with the second outer spiral stripe 62 at the rear end area of the folding tube 2, and because the guide block 67 of the second limit retainer 66 is in guide fit with the guide groove 12 of the sheath tube 1, the folding tube 2 moves forwards in a non-rotating way, because the fixing sleeve 3 is sleeved in the folding tube 2, the front end of the fixing sleeve 3 is designed to be a smooth curved surface and a section of wavy bulge 33, when the front end of the folding tube 2 moves forwards, the inner wall of the bracket folding piece 21 is propped against the wavy bulge 33 at the front end of the fixing sleeve 3, the bracket folding piece 21 distributed circumferentially is propped up into a horn shape under the action of the wavy bulge 33, when the folding tube 2 moves forwards axially, the bracket folding piece 21 is propped up in a horn shape on one side until the unfolded bracket folding piece 21 wraps one end of the bracket 7, and the unfolding area of the horn-shaped bracket folding piece 21 is larger than the horn-shaped opening of the sheath tube, and the bracket folding piece 21 cannot completely wrap the bracket 7 before the sheath tube 1 folds the bracket 7 in order to prevent the sheath tube 1 from being folded.
Working state five: at this time, the first hand wheel 61 is rotated, and the sheath 1 moves forward axially under the screw fit of the first hand wheel 61 and the guiding fit of the first limiting retainer 65 until the sheath 1 wraps the stent folding piece 21 and the stent 7 at the folding end.
Working state six: continuing to rotate the first hand wheel 61, the sheath tube 1 continues to move forwards, because the hooks 51 hook the support 7 to enable the support 7 to be incapable of retreating, the sheath tube 1 folds and wraps the rest of the support 7 by utilizing the horn-shaped opening structure, the support 7 completely enters the sheath tube 1, then reversely rotates the second hand wheel 62 to enable the folding tube 2 to move backwards axially, the inner wall of the support folding piece 21 is separated from the wavy bulge 33 at the front end of the fixed sleeve 3, the support folding piece 21 is changed into a folding state again, finally the device is taken out, and the recovery of the support 7 is completed.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (4)
1. The hook recovery device of the visible and controllable intra-cavity bracket is used for hooking the bracket in the cavity of a human body and is characterized by comprising a fixed sleeve, a hook receiving and releasing pipe sleeved in the fixed sleeve and a hook pipe sleeved in a hook through hole arranged on the fixed sleeve; the front end of the hook pipe is provided with a hook for hooking the bracket, the tail end of the hook pipe is connected with a hook pushing ring, and the hook retraction pipe is provided with a pushing check ring for pushing the hook pushing ring to enable the hook pipe to move forwards;
the device also comprises a sheath tube used for sleeving the bracket and a hand pushing mechanism used for moving the sheath tube, and the fixed sleeve tube is sleeved in the sheath tube;
the hand pushing mechanism can also enable the furling pipe to move;
the front end of the hook folding and unfolding pipe is provided with a hook supporting disc, and the hook supporting disc is provided with a hook supporting hole for the hook to pass through; the distance between the hook supporting hole and the axis of the fixed sleeve is larger than the distance between the hook via hole and the axis of the fixed sleeve, so that in a state that a hook pipe passing through the hook via hole and the hook supporting hole is lifted at an angle, when the distance between the hook via hole and the hook supporting hole is longer, the divergence angle between the hook pipes is smaller, when the distance between the hook via hole and the hook supporting hole is closer, the divergence angle between the hook pipes is larger, the lifting angle is larger, and the angles of the hook supporting holes on the hook supporting disc at the front end of the hook retraction pipe are also distributed in a lifting divergence mode;
the hook pushing ring is provided with a round hole, and the tail end of the fixed sleeve is provided with an expansion plug for being inserted into the round hole; the expansion plug is designed to be split from the top to the middle lower end, and the front end of the expansion plug is split into a micro-open state under the action of no external force, so that the expansion plug can be conveniently clamped into a round hole, and the round hole is opened to be clamped;
the hook pipe is provided with a spring retainer ring and a spring, and the spring is positioned between the spring retainer ring and the hook push ring;
the front end of the folding pipe is provided with an elastic bracket folding piece, and the front end of the fixed sleeve is provided with a bulge for jacking the bracket folding piece;
the middle of the folding pipe is of a sleeve structure, the front end of the folding pipe is provided with three or more support folding pieces which are uniformly distributed along the circumference and have elastic arc-shaped sheet designs, the number of the support folding pieces, the number of the hook through holes and the number of the hook supporting holes are the same, the support folding pieces are gradually thickened from the front end edge to the rear inner wall, when the support folding pieces at the front end of the folding pipe are in no external force effect, the support folding pieces are in a horn-shaped divergent shape, the middle position of the outer wall of the support folding pieces is provided with a circumferential outer long groove, the inside of the outer long groove is sleeved with a spiral tightening ring, and the spiral tightening ring plays a role in tightening the support folding pieces at the front end of the folding pipe, so that the support folding pieces are kept in a horizontally tightened state in the sheath pipe when the support folding pieces are not jacked.
2. The visually controllable in-channel stent hook recovery device of claim 1, wherein the sheath is provided with a first external spiral strip, and the hand pushing mechanism comprises a first hand wheel for threaded connection with the first external spiral strip.
3. The visually controllable in-channel stent hook recovery device of claim 2, wherein a second external spiral strip is provided on the gathering tube, and the hand pushing mechanism further comprises a second hand wheel for threaded connection with the second external spiral strip.
4. The device for hooking and recycling a visible and controllable intra-cavity bracket according to claim 3, wherein the hand pushing mechanism further comprises a handle, a fixed ferrule connected with the handle, a first limit retainer ring and a second limit retainer ring; the fixed sleeve ring is sleeved on the fixed sleeve, the first limiting check ring and the second limiting check ring are sleeved on the sheath tube and the furling tube respectively, the first hand wheel is positioned between the two first limiting check rings, and the second hand wheel is positioned between the two second limiting check rings.
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| CN201810314112.2A CN108420487B (en) | 2018-04-10 | 2018-04-10 | Visual controllable hooking recovery device for intra-cavity support |
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| CN201810314112.2A CN108420487B (en) | 2018-04-10 | 2018-04-10 | Visual controllable hooking recovery device for intra-cavity support |
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| CN109350307B (en) * | 2018-12-03 | 2023-08-29 | 宁波健世科技股份有限公司 | Transcatheter prosthetic valve replacement system |
| CN110236642A (en) * | 2019-06-18 | 2019-09-17 | 金华职业技术学院 | A kind of bioclastic acquisition method |
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| CN108420487A (en) | 2018-08-21 |
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